Top Videos: Amy Poehler on Billy on the Street, First Scene of OITNB Season 2

This week,Amy Poehlerreturned toBilly on the Street, and tried to fool New York City pedestrians into thinking she wasPitbull.Brian Williamsreturned toThe Tonight Showand "rapped" "Gin and Juice," andBarack ObamaandHillary Clinton"sang" "Timber." Also, we got a first look at the first ...

Amy Poehler on Billy on the Street: Love him or hate him, Billy Eichner has no shortage of ideas with which to harass people on the streets of New York City. In this episode of Billy on the Street, he's joined by Amy Poehler, who's "disguised" as Pitbull. Check out their game of "It's Not Pitbull, It's Amy Poehler":

Orange Is the New Black: We could hardly click "Play" fast enough when Netflix released the first scene of Orange Is the New Black's second season this week. Is it June 6 yet?

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Brian Williams raps: Brian Williams returned to The Tonight Show this week, and in honor of his visit, Jimmy Fallon premiered a new "Brian Williams Raps" video. This time, the NBC News anchor tackles Snoop Dogg's "Gin and Juice."

"Happy" without music: Pharrell's ubiquitous "Happy" is the feel-good song of the year, but if you remove the music from the music video, it's actually kind of sad.

Barack Obama and Hillary Clinton sing "Timber": Will the BaracksDubs YouTube channel ever get old? (Answer: No.) And in the latest video, he gets a little help from Hillary Clinton on a new version of the Pitbull/Kesha collaboration "Timber."

Time-Lapse London: During his Easter break, Lewis Symonds, a 16-year-old student from Great Britain, stitched together this gorgeous time-lapse video featuring 7,500 images of London. The photos were shot over a period of five days, and Symonds says the editing process took him about 24 hours.